I went into the Apple store today to resolve an issue with my photos not coming over when I updated iPhone to iOS 9.1. The guy had me back up my phone there, then erase and restore my phone. Not only did this not fix the photo problem, I now have none of my text messages - one which was extremely important. I have spoken to apple on the phone, spoken to AT&T and no one seems to be able to figure out what happened. I just need the text messages back. Anyone have any advise? It would be very much appreciated! iPhone 6sI cannot make sure how those photos are gone after update iPhone 6s to iOS 9.1, what I can be sure is when you restore an iCloud backup to your iPhone, you have to erase those contents in your iPhone firstly. However, the guy from Apple store backed up his iPhone before erase those data from iPhone. So the messages are still in the iCloud backup. I recommend one software named iFonebox to help you view and extract those messages from iCloud backup, without wiping any data from your iPhone 6s.
iFonebox is a professional iOS data recovery software which supports to extract and restore data like messages from iCloud or iTunes backup. Also, it is able to recover deleted data like contacts, notes, WeChat data, etc, from iPhone, iPad and iPod touch. There are three working modes for iFonebox: recover from iOS device directly, restore data from iTunes backup selectively and retrieve data from iCloud backup. Here, we will focus on restoring messages from iCloud backup in detailed steps.
It is necessary for you to download and install iFonebox on your computer. It is suitable for both Windows and Mac users.

How to recover lost text messages when update iPhone to iOS 9?You can follow simple steps below after installation. Take iFonebox for Windows as example.
--Launch iFonebox. Choose Recover from iCloud Backup. Please sign in with your Apple ID and password, then choose one iCloud backup containing your messages to download. Once you click Download button, there will be a popup to remind you select data you need to download. You can just select Messages to download. This process may take a few minutes if you have a large iCloud backup.
--Scan messages from downloaded iCloud backup. Click on Messages item to begin scanning process.
--Preview and choose lost messages to recover. After scanning, you can view those messages in iCloud backup. If in need, you can select those messages and then click Recover to PC button to export messages from iCloud backup to your computer.
It is quite convenient to use iFonebox to recover lost text messages when update iPhone to iOS 9.